Doesn't saund that impossible, for the podcast to end, ~100 - 200 episodes is the average life of a typical podcast.
But i doubt it, because they trumpeted PcPer office refurbishment wery extensively.
This was eather a joke, or they ar going on a vacation or conference for a week simultaneously. Hence the joke that Josh will lead the 200 podcast episode single handedly.

199 being the last is a joke. The threat that brought up the cancellation was that on the 200th episode, I would do the podcast without a shirt and wearing tassles. The horrified Ryan so much that he called 199 the last so that the breadth of humanity would be spared from me fulfilling my threat.

Agreed on the time stamps, i know other pod-casters have done it by using recording software that allows you to click a button for a bookmark on a spot of the recording. So they click this whenever changing topics, then later in editing they just grab the time stamp from each bookmark and paste it into the show notes.